>>43200671This.
I know most people are joking when they call Landorus the genie of healthy meta, but it actually did keep OU healthy.
Landorus keeps Excadrill, Kommo-O, and Zeraora in line and also shits on Toxapex and (to a lesser extent) Hippowdon.
Heatran deals with Clef, Corv, and Ferrothorn, which I've also grown to realize that I hate over the course of gen 8.
But more importantly, neither Lando nor Heatran are oppressive. They don't have reliable recovery and both have quad-weaknesses, so you can't just dump them into battle mindlessly.